Quite a while back there were reports that Motorola Xoom users could send their devices back to Motorola in order to get it modified to include support for 4G LTE. While that day has yet to arrive, it seems that if you’re a business or working for the government, you should be expecting an email from Motorola notifying you that you will be eligible for the upgrade.
No word on when regular Xoom users will be able to enjoy the upgrade, although there are rumors that they should be able to expect the same treatment some time in September.